Bug 17252

Acid3 test removing Nodes during NodeIterator walk fails Test 2: reached expectation 13 when expecting expectation 12 We'll need to reduce this further. function () { // test 2: Removing nodes during iteration var count = 0; var expect = function(n, node1, node2) { count += 1; assert(n == count, "reached expectation " + n + " when expecting expectation " + count); assertEquals(node1, node2, "expectation " + count + " failed"); }; var doc = getTestDocument(); var t1 = doc.body.appendChild(doc.createElement('t1')); var t2 = doc.body.appendChild(doc.createElement('t2')); var t3 = doc.body.appendChild(doc.createElement('t3')); var t4 = doc.body.appendChild(doc.createElement('t4')); var callCount = 0; var filterFunctions = [ function (node) { expect(1, node, doc.body); return true; }, // filter 0 function (node) { expect(3, node, t1); return true; }, // filter 1 function (node) { expect(5, node, t2); return true; }, // filter 2 function (node) { expect(7, node, t3); doc.body.removeChild(t4); return true; }, // filter 3 function (node) { expect(9, node, t4); return true; }, // filter 4 function (node) { expect(11, node, t4); doc.body.removeChild(t4); return 2 /* REJECT */; }, // filter 5 function (node) { expect(12, node, t3); return true; }, // filter 6 function (node) { expect(14, node, t2); doc.body.removeChild(t2); return true; }, // filter 7 function (node) { expect(16, node, t1); return true; }, // filter 8 ]; var i = doc.createNodeIterator(doc.documentElement.lastChild, 0xFFFFFFFF, function (node) { return filterFunctions[callCount++](node); }, true); // * B 1 2 3 4 expect(2, i.nextNode(), doc.body); // filter 0 // [B] * 1 2 3 4 expect(4, i.nextNode(), t1); // filter 1 // B [1] * 2 3 4 expect(6, i.nextNode(), t2); // filter 2 // B 1 [2] * 3 4 expect(8, i.nextNode(), t3); // filter 3 // B 1 2 [3] * doc.body.appendChild(t4); // B 1 2 [3] * 4 expect(10, i.nextNode(), t4); // filter 4 // B 1 2 3 [4] * expect(13, i.previousNode(), t3); // filters 5, 6 // B 1 2 3 * (4) // filter 5 // B 1 2 [3] * // between 5 and 6 // B 1 2 * (3) // filter 6 // B 1 2 * [3] expect(15, i.previousNode(), t2); // filter 7 // B 1 2 * (2) [3] // -- spec says "For instance, if a NodeFilter removes a node // from a document, it can still accept the node, which // means that the node may be returned by the NodeIterator // or TreeWalker even though it is no longer in the subtree // being traversed." // -- but it also says "If changes to the iterated list do not // remove the reference node, they do not affect the state // of the NodeIterator." // B 1 * [3] expect(17, i.previousNode(), t1); // filter 8 // B [1] * 3 return 1; },